26 Questions
What is typical for all mandibular molars?
Flattened buccal cusps
Which type of cusps are flattened in mandibular molars?
Buccal cusps
What is a characteristic feature of mandibular molars?
Flattened buccal cusps
In which type of teeth are buccal cusps typically flattened?
Mandibular molars
What is a common feature of all lower molars?
Flattened buccal cusps
What can be seen from this aspect?
Both roots
Approximately how far is the point of bifurcation from the cervical line?
3mm below the cervical line
What is the point of bifurcation?
Where the roots separate
What is the cervical line?
The point where the roots meet the neck of the womb
What is being referred to by the phrase 'this aspect'?
A specific view or perspective
What is the shape of the mesial outline from the cervix to the contact area?
Somewhat concave
Where is the contact area approximately located?
At the junction of the occlusal and the middle third of the crown
What is the shape of the distal outline of the crown from the cervix to the contact area?
Straight
How is the level of the mesial contact area related to the level of the cervix?
It is little cervical to the level of the cervix
What is the direction of the distal outline of the crown from the cervix to the contact area?
From the cervix to the contact area
What is the position of the contact area relative to the cervix?
Little cervical to the level of the cervix
Where is the mesial marginal ridge placed in relation to the cusp tips?
1mm below the level of the cusp tips
What is the relationship between the mesial marginal ridge and the mesial ridges of the mesiobuccal and mesiolingual cusps?
They are confluent
Which of the following cusps does the mesial marginal ridge connect with?
Both the mesiobuccal and mesiolingual cusps
What is the position of the mesial marginal ridge relative to the mesiobuccal cusp?
It is confluent with the mesial ridge of the mesiobuccal cusp
What is the characteristic of the mesial marginal ridge in relation to the cusp tips?
It is lower than the cusp tips
What is the name of the developmental groove located on the distal surface of a tooth?
Distobuccal developmental groove
How many pits are typically found on a mandibular molar?
Three
What is the name of the groove located on the lingual surface of a tooth?
Lingual developmental groove
Where is the central pit typically located on a mandibular molar?
Central surface
What is the name of the developmental groove located on the buccal surface of a tooth?
Buccal developmental groove
Study Notes
Morphology of Mandibular Molars
- Mesial outline of the crown is somewhat concave, almost straight, from the cervix to the contact area, which is approximately at the junction of the occlusal and the middle third of the crown.
- The distal outline of the crown is straight from the cervix to the contact area, which is little cervical to the level of the mesial contact area.
- Flattened buccal cusps are typical for all mandibular molars.
- Both roots are visible from the buccal aspect, and the point of bifurcation is located approximately 3mm below the cervical line.
- The mesial marginal ridge is confluent with the mesial ridges of the mesiobuccal and mesiolingual cusps, placed 1mm below the level of the cusp tips.
- Developmental grooves are present:
- Distobuccal developmental groove (3)
- Lingual developmental groove (4)
- There are three pits:
- Central pit (1)
- Middle pit (2)
- Central fossa (3)
This quiz covers the mesial outline of a tooth, from the cervix to the contact area, and its relation to the occlusal and crown.
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